Revert "Spec compliance: handle top-level mappings in function calls"

jsonrpc_base/jsonrpc.py

@@ -1,4 +1,3 @@
-import collections
 import inspect
 import json
 import logging
@@ -135,13 +134,6 @@ def __request(self, method_name, args=None, kwargs=None):
             raise ProtocolError(
                 'JSON-RPC spec forbids mixing arguments and keyword arguments')
 
-        # from the specs:
-        # "If resent, parameters for the rpc call MUST be provided as a
-        # Structured value.  Either by-position through an Array or by-name
-        # through an Object."
-        if len(args) == 1 and isinstance(args[0], collections.abc.Mapping):
-            args = dict(args[0])
-
         return self.send_message(Request(method_name, args or kwargs, msg_id))
 
     def __register(self, method_name, callback):

tests.py

@@ -229,7 +229,7 @@ def handler2(message):
 
     # rpc call with a mapping type
     def handler3(message):
-        assert message.params == {'foo': 'bar'}
+        assert message.params == [{'foo': 'bar'}]
         return {
             "jsonrpc": "2.0",
             "result": None,
@@ -239,6 +239,18 @@ def handler3(message):
     server._handler = handler3
     server.foobar({'foo': 'bar'})
 
+    # rpc call with direct dict params
+    def handler3(message):
+        assert message.params == {'foo': 'bar'}
+        return {
+            "jsonrpc": "2.0",
+            "result": None,
+            "id": 1,
+        }
+
+    server._handler = handler3
+    server.foobar(**{'foo': 'bar'})
+
 
 def test_notification(server):
     # Verify that we ignore the server response